Burping Made Easy - No more frustrating time consuming untwisting and prying off lids. Use the oxygen extractor pump to burp the jar. Simply place, pump, press, done! Airlock Valve Technology - We use waterless airlock valve technology which functions as a sealing vapor lock for your container, allowing carbon dioxide to escape without letting oxygen in.Date Tracker - Keep track of batches with our date tracker embedded in every lid! No more needing to remember when that batch started. Minimizes Chances of Bud Rot - These lids create a vacuum seal inside your jar. It is very hard for contaminates to grow in a vacuum increasing your chances for success! At BurpLids we have made it our goal to provide you with the best Curing Lids that will make your Curing experience a whole lot easier, stress-free and successful. This item is in the category "Collectibles\Kitchen & Home\Kitchen Storage & Organization\Other Kitchen Storage". The seller is "adel-store" and is located in this country: US. This item can be shipped to United States.